Amal Khalil, 43, was killed in the town of al-Tayri while covering the aftermath of earlier Israeli attacks alongside freelance photographer Zeinab Faraj, who was wounded.
According to reports, an initial air strike hit a car in front of them, prompting the pair to take shelter in a nearby house.
A second strike then hit the house, Lebanon’s health ministry and other sources said.
Rescuers managed to retrieve Faraj, who sustained a head injury.
When they returned for Khalil, Israeli forces opened fire on the ambulance and deployed a stun grenade, preventing access to her, according to the health ministry.
Rescuers were only able to reach her hours later, finding her dead.